head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Practiced Mastery
Peak PS2-era Ratchet, blending arsenal progression with polished combat arenas.

Optimization · Practiced Mastery
A minimalist action adventure about toppling sixteen colossal puzzle-bosses.
Ratchet & Clank: Up Your Arsenal leans Optimization (Practiced Mastery); Shadow of the Colossus leans Optimization (Practiced Mastery).
Shadow of the Colossus leans a little harder on execution, though the gap is small.
Ratchet & Clank: Up Your Arsenal
Faster combat demanding strafing and aim precision.
Shadow of the Colossus
Climbing, grip management, and sword timing on moving giants.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Ratchet & Clank: Up Your Arsenal
Campaign is scripted; legacy multiplayer added a thin PvP layer.
Shadow of the Colossus
Colossi follow fixed behavior patterns.
Ratchet & Clank: Up Your Arsenal leans a little harder on variance, though the gap is small.
Ratchet & Clank: Up Your Arsenal
Unknown encounters only on first playthrough.
Shadow of the Colossus
Encounters play out nearly identically each attempt.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Ratchet & Clank: Up Your Arsenal
Weapon XP, bolt economy, and route mastery decide everything.
Shadow of the Colossus
Each colossus is a solvable climbing puzzle.
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.